145491

2,3-Dimethyl-1,3-butadien

98%, contains 100 ppm BHT as stabilizer

• Synonym(e): 2,3-Dimethylbuta-1,2-diene, 2,3-Dimethylenebutane, Biisopropenyl, Diisopropenyl
• Lineare Formel: CH₂=C(CH₃)C(CH₃)=CH₂
• CAS-Nummer: 513-81-5
• Molekulargewicht: 82.14
• Beilstein: 605285
• EG-Nummer: 208-172-0
• MDL-Nummer: MFCD00008595
• UNSPSC-Code: 12352100
• PubChem Substanz-ID: 24848729
• NACRES: NA.22

Eigenschaften

• Dampfdruck: 269 mmHg ( 37.7 °C)
• Qualitätsniveau: 200
• Assay: 98%
• Form: liquid
• Enthält: 100 ppm BHT as stabilizer
• Brechungsindex: n20/D 1.438 (lit.)
• bp: 68-69 °C (lit.)
• mp (Schmelzpunkt): −76 °C (lit.)
• Dichte: 0.726 g/mL at 25 °C (lit.)
• Lagertemp.: 2-8°C
• SMILES String: CC(=C)C(C)=C
• InChI: 1S/C6H10/c1-5(2)6(3)4/h1,3H2,2,4H3
• InChIKey: SDJHPPZKZZWAKF-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

2,3-Dimethyl-1,3-butadiene (DMBD) is a conjugated diene. It undergoes Diels Alder cycloaddition reaction with 2-thio-3-chloroacrylamides under thermal, catalytic and microwave conditions. It undergoes thermal [4+2] cycloaddition reaction with 3-acetyl-, 3-carbamoyl and 3-ethoxycarbonylcoumarins under solvent free conditions. DMBD participates in polymerization reactions in the presence of iron dichloride complexes based catalysts.

Anwendung

2,3-Dimethyl-1,3-butadiene was used to investigate the reactions of 1,3-dienes with the Si(001) surface using scanning tunneling microscopy and fourier transform infrared spectroscopy.
It may be used in the following processes:

• Preparation of 1,3,6-triene derivatives of corresponding 1-aryl-substituted 1,3-dienes by 1,4-hydrobutadienylation in the presence of cobalt catalyst.
• Synthesis of 6-aryl(hetaryl)-3,4-dimethyl-1-nitro-1-cyano-3-cyclohexenes by reacting with gem-cyanonitroethenes.
• As a halogen trap during the study of the photolysis reaction of dibromo adduct of 2,5-diphenyltellurophene.

Sicherheitshinweise

• Piktogramme: GHS02
• Signalwort: Danger
• H-Sätze: H225
• P-Sätze: P210 - P233 - P240 - P241 - P242 - P243
• Gefahreneinstufungen: Flam. Liq. 2
• Lagerklassenschlüssel: 3 - Flammable liquids
• WGK: WGK 3
• Flammpunkt (°F): 30.2 °F - closed cup
• Flammpunkt (°C): -1 °C - closed cup
• Persönliche Schutzausrüstung: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter